Results 1 to 10 of 10

Newton's Third Law

This is a discussion on Newton's Third Law within the Off Topic forums, part of the Entertainment category; OK so i got 2 little cars, one of them has more mass than the other one.BOTH CARS MOVING and ...
Page: 1


  1. #1
    OohYouTouchedMyTraLa
    Guest

    Default

    OK

    so i got 2 little cars, one of them has more mass than the other one.BOTH CARS MOVING and impact. Which one pushes and which one pulls? (AKA which one has the + Newtons and which one has the - ones? )

  2. #2
    Community Nazı Senior Member schrotti's Avatar
    Join Date
    Mar 2006
    Location
    nazıland
    Posts
    3,482

    Default

    the one resting got the positive ones, i believe.. gosh, didnt have physics for like 4 years now

  3. #3
    OohYouTouchedMyTraLa
    Guest

    Default

    Next question:

    i got 2 cars connected by a rope. each car has another rope pulling it in different directions (one car being pulled left and the other one being pulled right) by a hanging mass that is equal for each one. which one has + tension and which one has - ?

  4. #4
    OohYouTouchedMyTraLa
    Guest

    Default

    the one resting got the positive ones, i believe.. gosh, didnt have physics for like 4 years now [/b]
    i edited it schrotts.

    and everyone said the opposite of that :P

  5. #5
    OohYouTouchedMyTraLa
    Guest

    Default

    pls

  6. #6
    Senior Member festo's Avatar
    Join Date
    Mar 2006
    Location
    England
    Posts
    2,820

    Default

    Im having to do Mechanical engineering as part of my electrical engineering course, Having to work out UDL's etc sucks cock!

  7. #7
    OohYouTouchedMyTraLa
    Guest

    Default

    gimme the answer, bitch!

  8. #8
    Senior Member PERESCANGRI's Avatar
    Join Date
    Mar 2007
    Location
    Diez
    Posts
    121

    Wink

    OK
    so i got 2 little cars, one of them has more mass than the other one.BOTH CARS MOVING and impact. Which one pushes and which one pulls? (AKA which one has the + Newtons and which one has the - ones? )[/b]
    Dependes on each cars speed... if they are both goin at the same speed and no acceleration, then the car with the greater mass would be the one that pushes
    If the car with the lower mass is goin at higher speed, you can calculete the Car's Newtons by a formula that you are supposed to know which I forgot.
    It goes something like (speed x mass (or weight)) if the acceleration is zero
    If you consider Acceleration its a whole different formula in which you'll have to use Factors like Time and probalily you'll work in a vacum

    Next question:
    i got 2 cars connected by a rope. each car has another rope pulling it in different directions (one car being pulled left and the other one being pulled right) by a hanging mass that is equal for each one. which one has + tension and which one has - ?[/b]
    I didn't understood ths question
    get on msn and tell me there :P

  9. #9
    Senior Member festo's Avatar
    Join Date
    Mar 2006
    Location
    England
    Posts
    2,820

    Default

    gimme the answer, bitch![/b]
    When i have to work out things like this i have to do C.W.M = A.C.W.M for the points at which moments occur. The question is quite open ended and dont quite get what your asking

  10. #10
    Senior Member
    Join Date
    Mar 2006
    Posts
    1,457

    Default

    Either you are not quoting the questions correctly or they are plain incorrect. What the hell does "pushing and pulling" mean with regards to physics? it doesn't even say the velocity of the 2 cars. If its a headon collision then the heavier car has more momentum and so continues in the same direction whereas the lighter car will travel in the reverse direction.

    As for the second question, again it doesn't give you enough information, or it is a trick question. Both cars would exert the same tension on the ropes if they are the same mass.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •